I
io.github.hqkh4nh/dejared
Explore, analyze, and decompile Java JAR files via MCP
UnknownNot tested
15FNo CVEsunknown
Quick Install
{
"mcpServers": {
"io-github-hqkh4nh-dejared": {
"command": "<see-readme>",
"args": []
}
}
}No install config available. Check the server's README for setup instructions.
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[](https://mcppedia.org/s/io-github-hqkh4nh-dejared)
Should you use this server?
Explore, analyze, and decompile Java JAR files via MCP
✓
Is it safe?
No package registry to scan.
No authentication — any process on your machine can connect.
License not specified.
~
Is it maintained?
Commit history unknown.
i
Will it work with my client?
Transport: stdio. Works with Claude Desktop, Cursor, Claude Code, and most MCP clients.
README
dejared-mcp
A Model Context Protocol (MCP) server for exploring, analyzing, and decompiling Java JAR files. Designed for AI-powered development tools, dejared-mcp connects your IDE or CLI assistant to inspect package structures, search bytecode, and decompile classes using CFR, Vineflower, or Procyon.
Table of Contents
- Overview
- Prerequisites
- Quick Start
- Features
- Decompiler Engines
- Installation and Configuration
- Custom Java Path
- Server Configuration
- How It Works
- FAQ and Troubleshooting
- Contributing
- Third-Party Licenses
- License
Overview
dejared-mcp is a Java-based MCP server distributed as an npm package.
It provides nine tools organized into three categories: discovery, hunting,
and deep analysis. AI assistants use these tools to navigate JAR file
structures, search for classes and string literals in bytecode, and
decompile .class files back to readable Java source code.
The npm package acts as a thin wrapper that downloads and caches the
server JAR on first run, then spawns it via java -jar using stdio
transport.
Prerequisites
- Node.js 18 or later
- Java 17 or later (JRE is sufficient)
Quick Start
Add the following to your MCP client configuration:
{
"mcpServers": {
"dejared": {
"command": "npx",
"args": ["-y", "dejared-mcp"]
}
}
}
See Installation and Configuration for tool-specific instructions.
Features
Discovery
Browse and read JAR contents.
| Tool | Description |
|---|---|
dejared_list_packages | List all packages with class counts |
dejared_list_classes | List classes in a specific package |
dejared_list_resources | List non-class resource files |
dejared_read_resource | Read text resources (YAML, XML, properties, JSON, and others) |
Hunting
Search inside JAR files.
| Tool | Description |
|---|---|
dejared_search_class | Search classes by name |
dejared_search_string | Search string literals in bytecode (URLs, SQL, error messages) |
Deep Analysis
Inspect metadata and decompile classes.
| Tool | Description |
|---|---|
dejared_get_metadata | Extract class metadata via ASM (fast, no decompilation) |
dejared_dump_package_metadata | Batch metadata extraction for entire packages |
dejared_decompile_class | Decompile .class files to Java source code |
Decompiler Engines
dejared-mcp supports three decompiler engines. The engine can be
specified per request via the dejared_decompile_class tool.
| Engine | Description |
|---|---|
| CFR (default) | Reliable general-purpose decompiler |
| Vineflower | Modern fork of FernFlower, handles newer Java features well |
| Procyon | Alternative engine, can handle some edge cases better |
Installation and Configuration
The standard configuration below works with most MCP-compatible tools. Expand the relevant section for tool-specific instructions.
{
"mcpServers": {
"dejared": {
"command": "npx",
"args": ["-y", "dejared-mcp"]
}
}
}
Amp
Add via the Amp VS Code extension settings screen or by updating your settings.json file:
"amp.mcpServers": {
... [View full README on GitHub](https://github.com/hqkh4nh/dejared-mcp#readme)
Test This Server
No automated test available for this server. Check the GitHub README for setup instructions.
Help improve this page
This server is missing a description. Tools and install config are also missing.If you've used it, help the community.
Add informationScore Breakdown
Security
2/30No known vulnerabilities.
○
Known CVEs — No package registry to scan
○
Tool safety — No tools to analyze
○
Tool poisoning — No tools to analyze
○
Injection vectors — No tools to analyze
○
Tool stability — First scan — baseline recorded
○
Dependency health — No package to analyze
✗
License — No license specified
○
Authentication — No authentication required
○
Repository — active repo
CVEs checked daily via OSV.dev. Score algorithm is open source.
Reviews
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Frequently Asked Questions
- Is io.github.hqkh4nh/dejared safe to use?
- io.github.hqkh4nh/dejared has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
- How do I install io.github.hqkh4nh/dejared?
- io.github.hqkh4nh/dejared can be installed by cloning its GitHub repository and following the setup instructions in the README.
- What AI clients work with io.github.hqkh4nh/dejared?
- io.github.hqkh4nh/dejared is compatible with Claude Desktop, Cursor, Claude Code, and most MCP clients that support stdio transport. It uses stdio transport.
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Discussion
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